HI anndee! Welcome to WHL! From what I understand Tumid Lupus is a subset of Discoid Lupus or SCLE which is a sub acute cutaneous lupus. According to the ones in the know (those wonderful doctors who tell us we are not sick when we are) The difference between Tumid and Discoid/SCLE is simply the type and location of the rash. Usually the rashes found in Tumit Lupus are only on sun exposed areas. This is an autoimmune disorder it is not as dangerous as other forms of Lupus (if that is the only thing one has).
Menieres is also an auto immune disease (at least in many cases). There are more than 67 (I think that is the correct number) AI diseases and the symptoms do overlap so much that often times even doctors are not sure where one disease ends and the next one begins. Many, maybe even most, of us have multiple diagnosis. I don't personally have Menieres but I am sure someone will be along shortly that has.
Once again, welcome to WHL we are so glad to have you here!!